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Exam Code: JN0-650

Exam Name: Enterprise Routing and Switching, Professional (JNCIP-ENT)

Certification Provider: Juniper

Corresponding Certification: JNCIP-ENT

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Juniper JN0-650 Practice Test 77

Question 760

An enterprise network designer recommends: Use EVPN MAC mobility signaling and appropriate sequence handling for the moved endpoint. Which situation most clearly calls for this action?

  1. An EVPN control plane must distribute the location of a learned tenant MAC address to remote VTEPs.
  2. A customer Ethernet segment is dual-attached to two EVPN provider edge switches and the control plane must recognize their shared segment identity.
  3. A virtual machine moves between VTEPs while retaining its MAC address and traffic must follow the new attachment point.
  4. Two tenants advertise identical MAC and IP information through overlapping EVPN address spaces and need distinct BGP route identities.

Explanation

Correct Answer

C:

This case requires the EVPN MAC mobility action. Remote peers can update forwarding toward the new MAC location.

Incorrect Answers

A:

This other case would be better matched to Advertise a BGP EVPN MAC/IP Type 2 route for the endpoint. Remote peers can learn host reachability without relying solely on data-plane flooding.

B:

This other case would be better matched to Configure the same supported Ethernet segment identifier for the intended multihoming pair. EVPN peers can recognize the dual-connected links as one Ethernet segment.

D:

This other case would be better matched to Assign appropriate route distinguishers to uniquely identify EVPN routes. Otherwise identical tenant reachability can remain distinct in the BGP EVPN control plane.

Question 761

An operator tries to find remote tenant MAC addresses solely by examining locally learned Ethernet frames. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use matching BGP route-target import and export policies for the tenant service.
  2. Use Ethernet auto-discovery EVPN Type 1 route signaling.
  3. Use EVPN Type 3 inclusive multicast Ethernet tag route signaling.
  4. Inspect EVPN MAC/IP routes and associated BGP signaling as well as the bridge MAC table.

Explanation

Correct Answer

D:

This action addresses EVPN control plane discovery. The operator can distinguish remotely signaled EVPN reachability from local MAC learning.

Incorrect Answers

A:

That action targets EVPN route target import: Only EVPN routes carrying permitted targets are imported into the intended service instance. It does not directly resolve the stated EVPN control plane discovery requirement.

B:

That action targets EVPN Type 1 Ethernet discovery: Remote EVPN peers can learn the Ethernet segment's auto-discovery reachability. It does not directly resolve the stated EVPN control plane discovery requirement.

C:

That action targets EVPN Type 3 inclusive multicast: Remote VTEPs can learn members of the broadcast unknown-unicast multicast delivery set. It does not directly resolve the stated EVPN control plane discovery requirement.

Question 762

A Junos network engineer takes this step: Inspect EVPN MAC/IP routes and associated BGP signaling as well as the bridge MAC table. Which outcome most directly follows?

  1. The operator can distinguish remotely signaled EVPN reachability from local MAC learning.
  2. Remote VTEPs can learn members of the broadcast unknown-unicast multicast delivery set.
  3. Remote EVPN peers can learn the Ethernet segment's auto-discovery reachability.
  4. Only EVPN routes carrying permitted targets are imported into the intended service instance.

Explanation

Correct Answer

A:

This is the direct result of the EVPN control plane discovery decision: The operator can distinguish remotely signaled EVPN reachability from local MAC learning.

Incorrect Answers

B:

This outcome is associated with EVPN Type 3 inclusive multicast (Use EVPN Type 3 inclusive multicast Ethernet tag route signaling.), not the specified action.

C:

This outcome is associated with EVPN Type 1 Ethernet discovery (Use Ethernet auto-discovery EVPN Type 1 route signaling.), not the specified action.

D:

This outcome is associated with EVPN route target import (Use matching BGP route-target import and export policies for the tenant service.), not the specified action.

Question 763

An operator tries to find remote tenant MAC addresses solely by examining locally learned Ethernet frames. A colleague instead suggests: Use Ethernet auto-discovery EVPN Type 1 route signaling. Which corrective approach most directly addresses the original issue?

  1. Use Ethernet auto-discovery EVPN Type 1 route signaling.
  2. Inspect EVPN MAC/IP routes and associated BGP signaling as well as the bridge MAC table.
  3. Use EVPN Type 3 inclusive multicast Ethernet tag route signaling.
  4. Use matching BGP route-target import and export policies for the tenant service.

Explanation

Correct Answer

B:

This corrective choice addresses EVPN control plane discovery. The operator can distinguish remotely signaled EVPN reachability from local MAC learning.

Incorrect Answers

A:

That alternative applies to EVPN Type 1 Ethernet discovery instead. Remote EVPN peers can learn the Ethernet segment's auto-discovery reachability.

C:

That alternative applies to EVPN Type 3 inclusive multicast instead. Remote VTEPs can learn members of the broadcast unknown-unicast multicast delivery set.

D:

That alternative applies to EVPN route target import instead. Only EVPN routes carrying permitted targets are imported into the intended service instance.

Question 764

An enterprise network designer recommends: Inspect EVPN MAC/IP routes and associated BGP signaling as well as the bridge MAC table. Which situation most clearly calls for this action?

  1. A new VXLAN bridge-domain participant needs to inform other VTEPs that it belongs to the broadcast and unknown-unicast replication set.
  2. A VTEP must import only EVPN routes belonging to its authorized tenant rather than every EVPN route in the fabric.
  3. An operator tries to find remote tenant MAC addresses solely by examining locally learned Ethernet frames.
  4. An EVPN multihomed Ethernet segment needs signaling to advertise association with reachable provider edge routers.

Explanation

Correct Answer

C:

This case requires the EVPN control plane discovery action. The operator can distinguish remotely signaled EVPN reachability from local MAC learning.

Incorrect Answers

A:

This other case would be better matched to Use EVPN Type 3 inclusive multicast Ethernet tag route signaling. Remote VTEPs can learn members of the broadcast unknown-unicast multicast delivery set.

B:

This other case would be better matched to Use matching BGP route-target import and export policies for the tenant service. Only EVPN routes carrying permitted targets are imported into the intended service instance.

D:

This other case would be better matched to Use Ethernet auto-discovery EVPN Type 1 route signaling. Remote EVPN peers can learn the Ethernet segment's auto-discovery reachability.

Question 765

A customer Ethernet segment is dual-attached to two EVPN provider edge switches and the control plane must recognize their shared segment identity. Which Junos networking action or protocol decision best addresses this requirement?

  1. Advertise a BGP EVPN MAC/IP Type 2 route for the endpoint.
  2. Configure the same supported Ethernet segment identifier for the intended multihoming pair.
  3. Assign appropriate route distinguishers to uniquely identify EVPN routes.
  4. Use EVPN MAC mobility signaling and appropriate sequence handling for the moved endpoint.

Explanation

Correct Answer

B:

This action addresses EVPN ESI identification. EVPN peers can recognize the dual-connected links as one Ethernet segment.

Incorrect Answers

A:

That action targets EVPN Type 2 MAC IP route: Remote peers can learn host reachability without relying solely on data-plane flooding. It does not directly resolve the stated EVPN ESI identification requirement.

C:

That action targets EVPN BGP route distinguisher: Otherwise identical tenant reachability can remain distinct in the BGP EVPN control plane. It does not directly resolve the stated EVPN ESI identification requirement.

D:

That action targets EVPN MAC mobility: Remote peers can update forwarding toward the new MAC location. It does not directly resolve the stated EVPN ESI identification requirement.

Question 766

A Junos network engineer takes this step: Configure the same supported Ethernet segment identifier for the intended multihoming pair. Which outcome most directly follows?

  1. Otherwise identical tenant reachability can remain distinct in the BGP EVPN control plane.
  2. Remote peers can update forwarding toward the new MAC location.
  3. EVPN peers can recognize the dual-connected links as one Ethernet segment.
  4. Remote peers can learn host reachability without relying solely on data-plane flooding.

Explanation

Correct Answer

C:

This is the direct result of the EVPN ESI identification decision: EVPN peers can recognize the dual-connected links as one Ethernet segment.

Incorrect Answers

A:

This outcome is associated with EVPN BGP route distinguisher (Assign appropriate route distinguishers to uniquely identify EVPN routes.), not the specified action.

B:

This outcome is associated with EVPN MAC mobility (Use EVPN MAC mobility signaling and appropriate sequence handling for the moved endpoint.), not the specified action.

D:

This outcome is associated with EVPN Type 2 MAC IP route (Advertise a BGP EVPN MAC/IP Type 2 route for the endpoint.), not the specified action.

Question 767

A customer Ethernet segment is dual-attached to two EVPN provider edge switches and the control plane must recognize their shared segment identity. A colleague instead suggests: Advertise a BGP EVPN MAC/IP Type 2 route for the endpoint. Which corrective approach most directly addresses the original issue?

  1. Assign appropriate route distinguishers to uniquely identify EVPN routes.
  2. Advertise a BGP EVPN MAC/IP Type 2 route for the endpoint.
  3. Use EVPN MAC mobility signaling and appropriate sequence handling for the moved endpoint.
  4. Configure the same supported Ethernet segment identifier for the intended multihoming pair.

Explanation

Correct Answer

D:

This corrective choice addresses EVPN ESI identification. EVPN peers can recognize the dual-connected links as one Ethernet segment.

Incorrect Answers

A:

That alternative applies to EVPN BGP route distinguisher instead. Otherwise identical tenant reachability can remain distinct in the BGP EVPN control plane.

B:

That alternative applies to EVPN Type 2 MAC IP route instead. Remote peers can learn host reachability without relying solely on data-plane flooding.

C:

That alternative applies to EVPN MAC mobility instead. Remote peers can update forwarding toward the new MAC location.

Question 768

An enterprise network designer recommends: Configure the same supported Ethernet segment identifier for the intended multihoming pair. Which situation most clearly calls for this action?

  1. A customer Ethernet segment is dual-attached to two EVPN provider edge switches and the control plane must recognize their shared segment identity.
  2. An EVPN control plane must distribute the location of a learned tenant MAC address to remote VTEPs.
  3. Two tenants advertise identical MAC and IP information through overlapping EVPN address spaces and need distinct BGP route identities.
  4. A virtual machine moves between VTEPs while retaining its MAC address and traffic must follow the new attachment point.

Explanation

Correct Answer

A:

This case requires the EVPN ESI identification action. EVPN peers can recognize the dual-connected links as one Ethernet segment.

Incorrect Answers

B:

This other case would be better matched to Advertise a BGP EVPN MAC/IP Type 2 route for the endpoint. Remote peers can learn host reachability without relying solely on data-plane flooding.

C:

This other case would be better matched to Assign appropriate route distinguishers to uniquely identify EVPN routes. Otherwise identical tenant reachability can remain distinct in the BGP EVPN control plane.

D:

This other case would be better matched to Use EVPN MAC mobility signaling and appropriate sequence handling for the moved endpoint. Remote peers can update forwarding toward the new MAC location.

Question 769

A tenant's Layer 2 broadcast domain must extend between two IP-connected data centers without extending its original physical VLAN trunks. Which Junos networking action or protocol decision best addresses this requirement?

  1. Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs.
  2. Use EVPN designated-forwarder election for the relevant Ethernet segment and service.
  3. Enable a supported all-active EVPN multihoming service with appropriate link aggregation.
  4. Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP.

Explanation

Correct Answer

A:

This action addresses VXLAN VNI mapping. The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.

Incorrect Answers

B:

That action targets EVPN designated forwarder: BUM traffic toward the segment can be controlled so redundant peers avoid duplicate delivery. It does not directly resolve the stated VXLAN VNI mapping requirement.

C:

That action targets All-active EVPN multihoming: Both active attachment links can participate in forwarding under the supported design. It does not directly resolve the stated VXLAN VNI mapping requirement.

D:

That action targets VXLAN transport encapsulation: The routed IP fabric can transport tenant Layer 2 traffic between VTEPs. It does not directly resolve the stated VXLAN VNI mapping requirement.

Question 770

A Junos network engineer takes this step: Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs. Which outcome most directly follows?

  1. Both active attachment links can participate in forwarding under the supported design.
  2. The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.
  3. BUM traffic toward the segment can be controlled so redundant peers avoid duplicate delivery.
  4. The routed IP fabric can transport tenant Layer 2 traffic between VTEPs.

Explanation

Correct Answer

B:

This is the direct result of the VXLAN VNI mapping decision: The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.

Incorrect Answers

A:

This outcome is associated with All-active EVPN multihoming (Enable a supported all-active EVPN multihoming service with appropriate link aggregation.), not the specified action.

C:

This outcome is associated with EVPN designated forwarder (Use EVPN designated-forwarder election for the relevant Ethernet segment and service.), not the specified action.

D:

This outcome is associated with VXLAN transport encapsulation (Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP.), not the specified action.

Enterprise Routing and Switching, Professional (JNCIP-ENT) (JN0-650) Practice Tests